<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="./demo.css">
</head>
<body>
    
<div class="map">

  
</div>
<button>悔棋</button>

<script src="./demo.js">

</script>



</body>
</html>




